Construction Of Supply Pump - Denso 4D56 Service Manual

Operation Section
1 8
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Supply pump interior
Regulating valve
Feed pump Rail
SCV (Suction Control Valve) Discharge valve
Overflow
Pumping portion (plunger)
Intake valve
Fuel tank
QD0705E

3.4 Construction of Supply Pump

The eccentric cam is attached to the drive shaft. The eccentric cam is connected to the ring cam.
Cam Shaft
Eccentric Cam
Ring Cam
QD0706E
As the drive shaft rotates, the eccentric cam rotates eccentrically, and the ring cam moves up and down while rotating.
Plunger
Eccentric Cam
Ring Cam
Cam Shaft
Q001233E
The plunger and the suction valve are attached to the ring cam. The feed pump is connected to the rear of the drive shaft.